Mark MOVZX16/MOVSX16 as neverHasSideEffects/mayLoad

llvm-svn: 160953

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86InstrExtension.td b/llvm/lib/Target/X86/X86InstrExtension.td
index 776667177d4..2eb454ded21 100644
--- a/llvm/lib/Target/X86/X86InstrExtension.td
+++ b/llvm/lib/Target/X86/X86InstrExtension.td
@@ -39,12 +39,15 @@ let neverHasSideEffects = 1 in {
 
 
 // Sign/Zero extenders
+let neverHasSideEffects = 1 in {
 def MOVSX16rr8 : I<0xBE, MRMSrcReg, (outs GR16:$dst), (ins GR8:$src),
                    "movs{bw|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVSX_R16_R8>,
                    TB, OpSize;
+let mayLoad = 1 in
 def MOVSX16rm8 : I<0xBE, MRMSrcMem, (outs GR16:$dst), (ins i8mem:$src),
                    "movs{bw|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVSX_R16_M8>,
                    TB, OpSize;
+} // neverHasSideEffects = 1
 def MOVSX32rr8 : I<0xBE, MRMSrcReg, (outs GR32:$dst), (ins GR8:$src),
                    "movs{bl|x}\t{$src, $dst|$dst, $src}",
                    [(set GR32:$dst, (sext GR8:$src))], IIC_MOVSX>, TB;
@@ -59,12 +62,15 @@ def MOVSX32rm16: I<0xBF, MRMSrcMem, (outs GR32:$dst), (ins i16mem:$src),
                    [(set GR32:$dst, (sextloadi32i16 addr:$src))], IIC_MOVSX>,
                    TB;
 
+let neverHasSideEffects = 1 in {
 def MOVZX16rr8 : I<0xB6, MRMSrcReg, (outs GR16:$dst), (ins GR8:$src),
                    "movz{bw|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX_R16_R8>,
                    TB, OpSize;
+let mayLoad = 1 in
 def MOVZX16rm8 : I<0xB6, MRMSrcMem, (outs GR16:$dst), (ins i8mem:$src),
                    "movz{bw|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX_R16_M8>,
                    TB, OpSize;
+} // neverHasSideEffects = 1
 def MOVZX32rr8 : I<0xB6, MRMSrcReg, (outs GR32:$dst), (ins GR8 :$src),
                    "movz{bl|x}\t{$src, $dst|$dst, $src}",
                    [(set GR32:$dst, (zext GR8:$src))], IIC_MOVZX>, TB;